Golovkin stops Murata, homes in on Canelo trilogy

Gennady Golovkin stopped Japan's Ryota Murata on Saturday to add the WBA middleweight title to his IBF belt and home in on a potentially career-defining third fight against Saul 'Canelo' Alvarez.

Kazakh star "GGG" Golovkin, who turned 40 on Friday, downed Murata in the ninth round in Saitama, north of Tokyo, to claim a technical knockout win in his first fight in 16 months and take his record to 42-1-1, with 37 KOs.

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The hard-hitting Golovkin had been hailed as the biggest name to enter a ring in Japan since heavyweight champion Mike Tyson, who was knocked out in Tokyo by 40-1 underdog James "Buster" Douglas in one of boxing's biggest upsets in 1990.

But 2012 London Olympics gold-medallist Murata could not pull off the same trick against Golovkin, who proved his punches have not lost any of their ferocious power even past his 40th birthday.

Golovkin will now turn his attention towards a potential third crack at pound-for-pound king Alvarez in a blockbuster trilogy fight later this year, having pushed the Mexican all the way in two previous epic encounters.

Murata made an aggressive start to the fight and rocked Golovkin with several big body shots in the early rounds.

The Kazakh looked in trouble but he steadied the ship and gradually took control as the match wore on.

Golovkin sent Murata's mouthpiece flying early in the sixth round and the Japanese fighter showed heart as he hung on in the face of a fierce attack.

There was no way back when Golovkin finally sent him to the canvass in the ninth round, however, as Murata's corner threw in the towel to end the fight.

The all-conquering Alvarez, having last year unified the four super-middleweight belts in just 11